MySQL Database connectivity issue in Ruby on Rails - mysql

Question

While following a tutorial I got an error while running rails server which said
Could not find gem 'mysql2 (~> 0.5)' in rubygems repository
https://rubygems.org/ or installed locally. The source does not
contain any versions of 'mysql2'
Run bundle install to install missing gems.
later I ran the command suggested and again I got an error
Installing mysql2 0.5.3 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory:
C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/mysql2-0.5.3/ext/mysql2
C:/Ruby30-x64/bin/ruby.exe -I C:/Ruby30-x64/lib/ruby/3.0.0 -r
./siteconf20210723-9416-we9bmo.rb extconf.rb
checking for rb_absint_size()... yes
checking for rb_absint_singlebit_p()... yes
checking for rb_wait_for_single_fd()... yes
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=C:/Ruby30-x64/bin/$(RUBY_BASE_NAME)
--with-mysql-dir
--without-mysql-dir
--with-mysql-include
--without-mysql-include=${mysql-dir}/include
--with-mysql-lib
--without-mysql-lib=${mysql-dir}/lib
--with-mysql-config
--without-mysql-config
--with-mysqlclient-dir
--without-mysqlclient-dir
--with-mysqlclient-include
--without-mysqlclient-include=${mysqlclient-dir}/include
--with-mysqlclient-lib
--without-mysqlclient-lib=${mysqlclient-dir}/lib
--with-mysqlclientlib
--without-mysqlclientlib
C:/Ruby30-x64/lib/ruby/3.0.0/mkmf.rb:1050:in `block in find_library': undefined
method `split' for nil:NilClass (NoMethodError)
from C:/Ruby30-x64/lib/ruby/3.0.0/mkmf.rb:1050:in `collect'
from C:/Ruby30-x64/lib/ruby/3.0.0/mkmf.rb:1050:in `find_library'
from extconf.rb:87:in `<main>'
To see why this extension failed to compile, please check the mkmf.log which can
be found here:
C:/Ruby30-x64/lib/ruby/gems/3.0.0/extensions/x64-mingw32/3.0.0/mysql2-0.5.3/mkmf.log
extconf failed, exit code 1
Gem files will remain installed in
C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/mysql2-0.5.3 for inspection.
Results logged to
C:/Ruby30-x64/lib/ruby/gems/3.0.0/extensions/x64-mingw32/3.0.0/mysql2-0.5.3/gem_make.out
An error occurred while installing mysql2 (0.5.3), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.5.3' --source 'https://rubygems.org/'`
succeeds before bundling.
In Gemfile:
mysql2
I'd appreciate it if someone could help me out with this one,
Thank you.

Answer 1

Try following command
sudo apt-get install ruby-dev
sudo apt-get install libmysqlclient-dev
sudo gem install mysql2